This month we mark the 10th anniversary of the outbreak of the Syrian civil war. Today, that war is largely over, but the picture of the Syrian girl wounded in a regime air strike (shown above) should serve as a reminder that its lessons should not be forgotten. The brutal regime of Syrian dictator Bashar al-Assad survived the challenge of what began as a peaceful popular uprising because the international community allowed him to commit war crimes while remaining indifferent to the crucial roles of those who aided and abetted his crimes: the Islamic Republic of Iran and Russia. Next month, we will mark Yom Hashoah, Holocaust Remembrance Day. As the United States seeks to reengage with Iran over its nuclear program, the lessons of history and the Holocaust should serve to inform future negotiations with the Islamic Republic.